The Board of Supervisors is slated to hear an appeal to the Planning Commission’s ruling Tuesday afternoon and the vote will be anything but a slam dunk.

It took more than seven hours for the Planning Commission to come to a split 4-2 decision to approve the EIR on March 22, with opposition coming from Hisashi Sugaya and Cindy Wu, both appointed by the supervisors. The project hasn’t become any less controversial in the weeks since.

The project calls for 145 luxury condominiums, each with an estimated price tag of $2.5 million to $7 million, set along the waterfront in buildings ranging in height from four- to 12-stories. The development also would include 29,000 square feet of public open space, a recreation center, ground-floor retail and an underground parking garage.

Opponents have filed two separate appeals with the supervisors. Equity Office Properties, which operates the Ferry Building, argues that the new project would eliminate a 100-space parking lot now used by their customers and cause other problems for the businesses there.

A second complaint, by Friends of the Golden Gateway, is more wide-ranging. It charges that the Planning Commission failed to deal with a number of important questions surrounding the development, including the visual impact of the row of multi-story buildings along the Embarcadero, the effect the elimination of the Golden Gateway Tennis and Swim Club would have on the area and the consequences of putting ultra-expensive housing on public land now owned by the port.

Both call on the supervisors to reject the current EIR and start all over again, a process that would take months.

The Port Commission originally was due to take up the environmental report at a special meeting Wednesday, but the decision now has been put off until May 29.

Both the supervisors and the port also will have to approve the specifics of the deal with the developers, who could come up with some sweeteners to the current plan to ease passage of the project.

Even if both the port and the board sign off on 8 Washington, the battle won’t be over. The developers still are likely to face lawsuits from the project’s opponents.